package org.example.news.service.impl;

import com.github.pagehelper.Page;
import com.github.pagehelper.PageHelper;
import org.example.news.mapper.ArticleMapper;
import org.example.news.pojo.Article;
import org.example.news.pojo.PageBean;
import org.example.news.service.ArticleService;
import org.example.news.utils.ThreadLocalUtil;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;

import java.time.LocalDateTime;
import java.util.List;
import java.util.Map;

@Service
public class ArticleServiceImpl implements ArticleService {

    @Autowired
    private ArticleMapper articleMapper;
    //新增文章
    @Override
    public void add(Article article) {
        //补充属性值
        article.setCreateTime(LocalDateTime.now());
        article.setUpdateTime(LocalDateTime.now());
        Map<String,Object> map=ThreadLocalUtil.get();   //获取用户id
        Integer userId= (Integer) map.get("id");
        article.setCreateUser(userId);
        articleMapper.add(article);
    }
    // 文章列表（条件分页）
    @Override
    public PageBean<Article> list(Integer pageNum, Integer pageSize, Integer categoryId, String state) {
        //1、创建pageBean对象
        PageBean<Article> pb=new PageBean<>();
        //2、开启分页查询PageHelper
        PageHelper.startPage(pageNum,pageSize);
        //3、调用mapper
        Map<String,Object> map=ThreadLocalUtil.get();
       Integer userId= (Integer) map.get("id");
       List<Article> as=articleMapper.list(userId,categoryId, state);
       //Page中提供了方法，可以获取PageHelper分页查询后，得到的总记录条数和当前页数据
        Page<Article> p=(Page<Article>) as;
        //把数据填充到PageBean对象中
        pb.setTotal(p.getTotal());
        pb.setItems(p.getResult());
        return pb;
    }
    //获取文章详情
    @Override
    public Article findById(Integer id) {
        Article a=articleMapper.findById(id);
        return a;
    }


    //删除文章
    @Override
    public void deleteById(Integer id) {
        articleMapper.deleteById(id);
    }


    //更新文章
    @Override
    public void update(Article article) {
    article.setUpdateTime(LocalDateTime.now());
    articleMapper.update(article);
    }






}
